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2 years ago

Y= -3/2x +3 is the same line as x + y =

Mathematics

1 answer:

Varvara68 [4.7K]2 years ago

6 0

I don’t know this question but you can’t divided by number and multiply

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What is the area of this triangle?<br><br> Enter your answer in the box.

olga2289 [7]

Answer: I'm pretty sure its 12

Step-by-step explanation: You count the unit length of the base and then find the height. Now you multiply them and divide by 2.

Hope this helps.

Branliest please

7 0

2 years ago

The radius of a circle is 9in. Find it’s circumference in terms of

Lady bird [3.3K]

${ \bf{ \underbrace{Given :}}}$

Radius of the circle " $r$ " = 9 in.

${ \bf{ \underbrace{To\:find:}}}$

The circumference of the circle.

${ \bf{ \underbrace{Solution :}}}$

$\sf\orange{The\:circumference \:of\:the\:circle\:is\:56.52\:in.}$

$\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}$

We know that,

$\sf\purple{Circumference\:of\:a\:circle \:=\:2πr }$

$= 2 \times 3.14 \times 9 \: in \\ \\ = 56.52 \: in$

Therefore, the circumference of the circle is 56.52 in.

$\huge{\textbf{\textsf{{\orange{My}}{\blue{st}}{\pink{iq}}{\purple{ue}}{\red{35}}{\green{♡}}}}}$

3 0

2 years ago

The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medici

Ilia_Sergeevich [38]

Answer:

$4600-1.646\frac{800}{\sqrt{1800}}=4568.96$

$4600+1.646\frac{800}{\sqrt{1800}}=4631.04$

We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)

Step-by-step explanation:

Information given

$\bar X=4600$ represent the sample mean for the amount spent on medicines

$\mu$ population mean

s=800 represent the sample standard deviation

n=1800 represent the sample size

Solution

The confidence interval for the true population mean is given by:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

We can calculate the degrees of freedom with:

$df=n-1=1800-1=1799$

We know that the Confidence level is 0.90 or 90%, the value of significance is $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,1799)".And we see that $t_{\alpha/2}=1.646$